Chemical Properties of arsenic (CAS 7440-38-2)

InChI

InChI=1S/As

InChI Key

RQNWIZPPADIBDY-UHFFFAOYSA-N

Formula

As

SMILES

[As]

Molecular Weight¹

74.92

CAS

7440-38-2

Other Names

• ARSEN

• EA : Electron affinity (eV).
• IE : Ionization energy (eV).
• P_vap : Vapor pressure (kPa).
• T_c : Critical Temperature (K).
• V_c : Critical Volume (m³/kmol).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
EA	[0.80; 0.81]	eV
EA	0.80 ± 0.00	eV	NIST
EA	0.81 ± 0.01	eV	NIST
EA	0.81 ± 0.03	eV	NIST
IE	[9.79; 10.00]	eV
IE	9.82	eV	NIST
IE	9.82	eV	NIST
IE	9.81	eV	NIST
IE	10.00 ± 0.30	eV	NIST
IE	10.00	eV	NIST
IE	9.79 ± 0.00	eV	NIST
IE	9.79 ± 0.00	eV	NIST
Tc	1673.00	K	KDB
Vc	0.035	m3/kmol	KDB

Correlations

Property	Value	Unit	Temperature (K)	Source
Pvap	[1.00e-03; 99.99]	kPa	[553.15; 874.15]	The Yaw...
Equation			ln(Pvp) = A + B/(T + C)
Coefficient A			2.23978e+01
Coefficient B			-1.45383e+04
Coefficient C			-5.70600e+01
Temperature range, min.			553.15
Temperature range, max.			874.15
Pvap	1.00e-03	kPa	553.15	Calculated Property
Pvap	7.14e-03	kPa	588.82	Calculated Property
Pvap	0.04	kPa	624.48	Calculated Property
Pvap	0.18	kPa	660.15	Calculated Property
Pvap	0.70	kPa	695.82	Calculated Property
Pvap	2.32	kPa	731.48	Calculated Property
Pvap	6.85	kPa	767.15	Calculated Property
Pvap	18.23	kPa	802.82	Calculated Property
Pvap	44.39	kPa	838.48	Calculated Property
Pvap	99.99	kPa	874.15	Calculated Property

Sources

• KDB
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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